Conventions

• All angles or coordinates are stored internally in radians
• All angles or coordinates mostly are presented to the user in degrees (sexagesimal format for stars)
• double must be used as storage

Use cases

Observability of a source (or list of sources) for a given interferometer

Inputs	User format	internal format
Star coordinate	anything valid (name or any std coords)	RAJ2000,DEJ2000
Observing site location	selection of one supported observatory	observatory reference
Date of observation ( or period of time )	like DDMMYYYYHHMM	(Modified) Julian Day ( precise up to the second )

Plot outputs: TODO : How to represent the observability of a list of star onto multi-telescope

Is the source visible in the sky ?

Is the source over the horizon ?

outputs	Internal/User	Format
celestial coordinates	Internal	HA / delta ?? units TBC TBD
over the horizon	User	boolean

What is the AirMass value ?

Inputs	User format	internal format
Seeing	choice or value ?	TBD
Humidity / Temperature...	choice or value ?	TBD

outputs	Internal/User	Format
AirMass	User	double

What is the best method to get the airmass value?

Where are the sun / moon ?

Inputs	User format	internal format
twilight constraints	angle degrees GM: est-ce que ASTRO/NAVAL/CIVIL sont des valeurs discrites qui parlent ?	double radians

outputs	Internal/User	Format
sunrise sunset moonrise moonset	User	DateTime couples

Est-ce qu'il faut gerer d'autre planetes sources lumineuses ??? Quelles doit etre la precision pour les ephemerides?

Is the star still visible given to a shadowing ???

Inputs	User format	internal format
environment shadowing ( telescopes, mountains, building ....)	angle d'obstruction ( de 0 a 90 degres) en fonction de l'azimuth (repere a definir)	couples of Altitude / Azimuth points ( pointer ver la specification (a faire) )
telescope(s) min elevation	angle degree	angle radians

outputs	Internal/User	Format

What is the formulae of the observability given to the whole previous results?

A-t'on besoin de calculer l'AirMass par station? Est-ce que la voute celeste est la meme pour toutes les stations a un meme moment?

S'arrete-ton des le premier critere mauvais ou doit on faire un bilan de pertes...( par ex: une mauvaise airmass compensee par un configuration optique avec moins de pertes)

Comment gere-t'on l'observalité d'une liste d'etoiles? Est simplement la juxtaposition des resultats independants ou y-a t'il des contraintes de gestion par groupe?

Modelling of a source from a given interferometer

TBD

Various informations

Station Coordinates

The software handles station coordinates as described in the OIFITS (see OI_ARRAY table description).

VLTI configuration

Eso defines the coordinates in an proprietary maner. The right way to get the right informations is to read the data from an AMBER oifits ( may be generated by ASPRO ).

CHARA configuration

Chara expresses the station coordinates in the same format as OIFITS : TBD find URL

Java astronomy libraries

JSkyCalc = Java version of skycalc
AstroLib
URLToBeDefined)?topicparent=Jmmc/Software.JmmcAsproProjectConception;nowysiwyg=0" rel="nofollow" title="PAL projet astrogrid (utilisé par APES et topcat) (this topic does not yet exist; you can create it)">PAL projet astrogrid (utilisé par APES et topcat)

Verifier : conversion coordonnees et ephemeride (au moins soleil et lune)

Various libraries

• Java Analysis studio 3 : advanced plot library (svg support)

Main ASPRO functionnalities compared to alternates tools

• APES

Observability plot

In contrary to APES, ASPRO is not a planetarium (too many animations/colors).
The main information consist in the observability timestamps of a target of a list of targets i.e. a simple list of time intervals could be enough (like the observation scheduler).
However, beyond this minimal view the user could have details in a pop up or a contextual window (target rise/set, elevation).
The user could add / remove / hide a target that is present in the plot

UV coverage plot

Use the Model Fitting GUI to define & display model parameters and associate a model per target instead of a single model for the current version of ASPRO.
This plot could be displayed when a target is selected on the Observability plot (if possible).

Other items

• APES 'Select a baseline' widget has an interesting interferometer representation but it's less important. An expert mode without any configuration constraints seems a good idea
• APES Paf files are specific to the PRIMA instrument and can not be reused. Only Observing blocks (OB) should be considered for ASPRO
• VMT is focused on a target model and has no observability feature
• Dealing with aspro setting files is an important feature to keep the user session / history
• Investigate plotting libraries that provide plot interactivity (batik supports svg format with javascript support ...)

1. refresh plot with new data when the user changes anything in widgets
2. interactive plot : the user can click on the plot to get information (predefined) or run other widgets